1 /* SPDX-License-Identifier: GPL-2.0-only */
2 #ifndef _ASM_X86_APIC_H
3 #define _ASM_X86_APIC_H
5 #include <linux/cpumask.h>
6 #include <linux/static_call.h>
8 #include <asm/alternative.h>
9 #include <asm/cpufeature.h>
10 #include <asm/apicdef.h>
11 #include <linux/atomic.h>
12 #include <asm/fixmap.h>
13 #include <asm/mpspec.h>
15 #include <asm/hardirq.h>
17 #include <asm/posted_intr.h>
19 #define ARCH_APICTIMER_STOPS_ON_C3 1
21 /* Macros for apic_extnmi which controls external NMI masking */
22 #define APIC_EXTNMI_BSP 0 /* Default */
23 #define APIC_EXTNMI_ALL 1
24 #define APIC_EXTNMI_NONE 2
30 #define APIC_VERBOSE 1
34 * Define the default level of output to be very little This can be turned
35 * up by using apic=verbose for more information and apic=debug for _lots_
36 * of information. apic_verbosity is defined in apic.c
38 #define apic_printk(v, s, a...) \
40 if ((v) <= apic_verbosity) \
44 #define apic_pr_verbose(s, a...) apic_printk(APIC_VERBOSE, KERN_INFO s, ##a)
45 #define apic_pr_debug(s, a...) apic_printk(APIC_DEBUG, KERN_DEBUG s, ##a)
46 #define apic_pr_debug_cont(s, a...) apic_printk(APIC_DEBUG, KERN_CONT s, ##a)
47 /* Unconditional debug prints for code which is guarded by apic_verbosity already */
48 #define apic_dbg(s, a...) printk(KERN_DEBUG s, ##a)
50 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
51 extern void x86_32_probe_apic(void);
53 static inline void x86_32_probe_apic(void) { }
56 extern u32 cpuid_to_apicid[];
58 #define CPU_ACPIID_INVALID U32_MAX
60 #ifdef CONFIG_X86_LOCAL_APIC
62 extern int apic_verbosity;
63 extern int local_apic_timer_c2_ok;
65 extern bool apic_is_disabled;
66 extern unsigned int lapic_timer_period;
68 extern enum apic_intr_mode_id apic_intr_mode;
69 enum apic_intr_mode_id {
72 APIC_VIRTUAL_WIRE_NO_CONFIG,
74 APIC_SYMMETRIC_IO_NO_ROUTING
78 * With 82489DX we can't rely on apic feature bit
79 * retrieved via cpuid but still have to deal with
80 * such an apic chip so we assume that SMP configuration
81 * is found from MP table (64bit case uses ACPI mostly
82 * which set smp presence flag as well so we are safe
83 * to use this helper too).
85 static inline bool apic_from_smp_config(void)
87 return smp_found_config && !apic_is_disabled;
91 * Basic functions accessing APICs.
93 #ifdef CONFIG_PARAVIRT
94 #include <asm/paravirt.h>
97 static inline void native_apic_mem_write(u32 reg, u32 v)
99 volatile u32 *addr = (volatile u32 *)(APIC_BASE + reg);
101 alternative_io("movl %0, %1", "xchgl %0, %1", X86_BUG_11AP,
102 ASM_OUTPUT("=r" (v), "=m" (*addr)),
103 ASM_INPUT("0" (v), "m" (*addr)));
106 static inline u32 native_apic_mem_read(u32 reg)
108 return readl((void __iomem *)(APIC_BASE + reg));
111 static inline void native_apic_mem_eoi(void)
113 native_apic_mem_write(APIC_EOI, APIC_EOI_ACK);
116 extern void native_apic_icr_write(u32 low, u32 id);
117 extern u64 native_apic_icr_read(void);
119 static inline bool apic_is_x2apic_enabled(void)
123 if (rdmsrq_safe(MSR_IA32_APICBASE, &msr))
125 return msr & X2APIC_ENABLE;
128 extern void enable_IR_x2apic(void);
130 extern int lapic_get_maxlvt(void);
131 extern void clear_local_APIC(void);
132 extern void disconnect_bsp_APIC(int virt_wire_setup);
133 extern void disable_local_APIC(void);
134 extern void apic_soft_disable(void);
135 extern void lapic_shutdown(void);
136 extern void sync_Arb_IDs(void);
137 extern void init_bsp_APIC(void);
138 extern void apic_intr_mode_select(void);
139 extern void apic_intr_mode_init(void);
140 extern void init_apic_mappings(void);
141 void register_lapic_address(unsigned long address);
142 extern void setup_boot_APIC_clock(void);
143 extern void setup_secondary_APIC_clock(void);
144 extern void lapic_update_tsc_freq(void);
147 static inline bool apic_force_enable(unsigned long addr)
152 extern bool apic_force_enable(unsigned long addr);
155 extern void apic_ap_setup(void);
158 * On 32bit this is mach-xxx local
161 extern int apic_is_clustered_box(void);
163 static inline int apic_is_clustered_box(void)
169 extern int setup_APIC_eilvt(u8 lvt_off, u8 vector, u8 msg_type, u8 mask);
170 extern void lapic_assign_system_vectors(void);
171 extern void lapic_assign_legacy_vector(unsigned int isairq, bool replace);
172 extern void lapic_update_legacy_vectors(void);
173 extern void lapic_online(void);
174 extern void lapic_offline(void);
175 extern bool apic_needs_pit(void);
177 extern void apic_send_IPI_allbutself(unsigned int vector);
179 extern void topology_register_apic(u32 apic_id, u32 acpi_id, bool present);
180 extern void topology_register_boot_apic(u32 apic_id);
181 extern int topology_hotplug_apic(u32 apic_id, u32 acpi_id);
182 extern void topology_hotunplug_apic(unsigned int cpu);
183 extern void topology_apply_cmdline_limits_early(void);
184 extern void topology_init_possible_cpus(void);
185 extern void topology_reset_possible_cpus_up(void);
187 #else /* !CONFIG_X86_LOCAL_APIC */
188 static inline void lapic_shutdown(void) { }
189 #define local_apic_timer_c2_ok 1
190 static inline void init_apic_mappings(void) { }
191 static inline void disable_local_APIC(void) { }
192 # define setup_boot_APIC_clock x86_init_noop
193 # define setup_secondary_APIC_clock x86_init_noop
194 static inline void lapic_update_tsc_freq(void) { }
195 static inline void init_bsp_APIC(void) { }
196 static inline void apic_intr_mode_select(void) { }
197 static inline void apic_intr_mode_init(void) { }
198 static inline void lapic_assign_system_vectors(void) { }
199 static inline void lapic_assign_legacy_vector(unsigned int i, bool r) { }
200 static inline bool apic_needs_pit(void) { return true; }
201 static inline void topology_apply_cmdline_limits_early(void) { }
202 static inline void topology_init_possible_cpus(void) { }
203 #endif /* !CONFIG_X86_LOCAL_APIC */
205 #ifdef CONFIG_X86_X2APIC
206 static inline void native_apic_msr_write(u32 reg, u32 v)
208 if (reg == APIC_DFR || reg == APIC_ID || reg == APIC_LDR ||
212 wrmsrq(APIC_BASE_MSR + (reg >> 4), v);
215 static inline void native_apic_msr_eoi(void)
217 native_wrmsrq(APIC_BASE_MSR + (APIC_EOI >> 4), APIC_EOI_ACK);
220 static inline u32 native_apic_msr_read(u32 reg)
227 rdmsrq(APIC_BASE_MSR + (reg >> 4), msr);
231 static inline void native_x2apic_icr_write(u32 low, u32 id)
233 wrmsrq(APIC_BASE_MSR + (APIC_ICR >> 4), ((__u64) id) << 32 | low);
236 static inline u64 native_x2apic_icr_read(void)
240 rdmsrq(APIC_BASE_MSR + (APIC_ICR >> 4), val);
244 extern int x2apic_mode;
245 extern int x2apic_phys;
246 extern void __init x2apic_set_max_apicid(u32 apicid);
247 extern void x2apic_setup(void);
248 static inline int x2apic_enabled(void)
250 return boot_cpu_has(X86_FEATURE_X2APIC) && apic_is_x2apic_enabled();
253 #define x2apic_supported() (boot_cpu_has(X86_FEATURE_X2APIC))
254 #else /* !CONFIG_X86_X2APIC */
255 static inline void x2apic_setup(void) { }
256 static inline int x2apic_enabled(void) { return 0; }
257 static inline u32 native_apic_msr_read(u32 reg) { BUG(); }
258 #define x2apic_mode (0)
259 #define x2apic_supported() (0)
260 #endif /* !CONFIG_X86_X2APIC */
261 extern void __init check_x2apic(void);
266 * Copyright 2004 James Cleverdon, IBM.
268 * Generic APIC sub-arch data struct.
270 * Hacked for x86-64 by James Cleverdon from i386 architecture code by
271 * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
275 /* Hotpath functions first */
277 void (*native_eoi)(void);
278 void (*write)(u32 reg, u32 v);
279 u32 (*read)(u32 reg);
281 /* IPI related functions */
282 void (*wait_icr_idle)(void);
283 u32 (*safe_wait_icr_idle)(void);
285 void (*send_IPI)(int cpu, int vector);
286 void (*send_IPI_mask)(const struct cpumask *mask, int vector);
287 void (*send_IPI_mask_allbutself)(const struct cpumask *msk, int vec);
288 void (*send_IPI_allbutself)(int vector);
289 void (*send_IPI_all)(int vector);
290 void (*send_IPI_self)(int vector);
293 dest_mode_logical : 1,
294 x2apic_set_max_apicid : 1,
295 nmi_to_offline_cpu : 1;
297 u32 (*calc_dest_apicid)(unsigned int cpu);
299 /* ICR related functions */
300 u64 (*icr_read)(void);
301 void (*icr_write)(u32 low, u32 high);
303 /* The limit of the APIC ID space. */
306 /* Probe, setup and smpboot functions */
308 int (*acpi_madt_oem_check)(char *oem_id, char *oem_table_id);
310 void (*init_apic_ldr)(void);
311 u32 (*cpu_present_to_apicid)(int mps_cpu);
313 u32 (*get_apic_id)(u32 id);
315 /* wakeup_secondary_cpu */
316 int (*wakeup_secondary_cpu)(u32 apicid, unsigned long start_eip, unsigned int cpu);
317 /* wakeup secondary CPU using 64-bit wakeup point */
318 int (*wakeup_secondary_cpu_64)(u32 apicid, unsigned long start_eip, unsigned int cpu);
323 struct apic_override {
325 void (*native_eoi)(void);
326 void (*write)(u32 reg, u32 v);
327 u32 (*read)(u32 reg);
328 void (*send_IPI)(int cpu, int vector);
329 void (*send_IPI_mask)(const struct cpumask *mask, int vector);
330 void (*send_IPI_mask_allbutself)(const struct cpumask *msk, int vec);
331 void (*send_IPI_allbutself)(int vector);
332 void (*send_IPI_all)(int vector);
333 void (*send_IPI_self)(int vector);
334 u64 (*icr_read)(void);
335 void (*icr_write)(u32 low, u32 high);
336 int (*wakeup_secondary_cpu)(u32 apicid, unsigned long start_eip, unsigned int cpu);
337 int (*wakeup_secondary_cpu_64)(u32 apicid, unsigned long start_eip, unsigned int cpu);
341 * Pointer to the local APIC driver in use on this system (there's
342 * always just one such driver in use - the kernel decides via an
343 * early probing process which one it picks - and then sticks to it):
345 extern struct apic *apic;
348 * APIC drivers are probed based on how they are listed in the .apicdrivers
349 * section. So the order is important and enforced by the ordering
350 * of different apic driver files in the Makefile.
352 #define apic_driver(sym) \
353 static const struct apic *__apicdrivers_##sym __used \
354 __aligned(sizeof(struct apic *)) \
355 __section(".apicdrivers") = { &sym }
357 extern struct apic *__apicdrivers[], *__apicdrivers_end[];
360 * APIC functionality to boot other CPUs - only used on SMP:
363 extern int lapic_can_unplug_cpu(void);
366 #ifdef CONFIG_X86_LOCAL_APIC
367 extern struct apic_override __x86_apic_override;
369 void __init apic_setup_apic_calls(void);
370 void __init apic_install_driver(struct apic *driver);
372 #define apic_update_callback(_callback, _fn) { \
373 __x86_apic_override._callback = _fn; \
374 apic->_callback = _fn; \
375 static_call_update(apic_call_##_callback, _fn); \
376 pr_info("APIC: %s() replaced with %ps()\n", #_callback, _fn); \
379 #define DECLARE_APIC_CALL(__cb) \
380 DECLARE_STATIC_CALL(apic_call_##__cb, *apic->__cb)
382 DECLARE_APIC_CALL(eoi);
383 DECLARE_APIC_CALL(native_eoi);
384 DECLARE_APIC_CALL(icr_read);
385 DECLARE_APIC_CALL(icr_write);
386 DECLARE_APIC_CALL(read);
387 DECLARE_APIC_CALL(send_IPI);
388 DECLARE_APIC_CALL(send_IPI_mask);
389 DECLARE_APIC_CALL(send_IPI_mask_allbutself);
390 DECLARE_APIC_CALL(send_IPI_allbutself);
391 DECLARE_APIC_CALL(send_IPI_all);
392 DECLARE_APIC_CALL(send_IPI_self);
393 DECLARE_APIC_CALL(wait_icr_idle);
394 DECLARE_APIC_CALL(wakeup_secondary_cpu);
395 DECLARE_APIC_CALL(wakeup_secondary_cpu_64);
396 DECLARE_APIC_CALL(write);
398 static __always_inline u32 apic_read(u32 reg)
400 return static_call(apic_call_read)(reg);
403 static __always_inline void apic_write(u32 reg, u32 val)
405 static_call(apic_call_write)(reg, val);
408 static __always_inline void apic_eoi(void)
410 static_call(apic_call_eoi)();
413 static __always_inline void apic_native_eoi(void)
415 static_call(apic_call_native_eoi)();
418 static __always_inline u64 apic_icr_read(void)
420 return static_call(apic_call_icr_read)();
423 static __always_inline void apic_icr_write(u32 low, u32 high)
425 static_call(apic_call_icr_write)(low, high);
428 static __always_inline void __apic_send_IPI(int cpu, int vector)
430 static_call(apic_call_send_IPI)(cpu, vector);
433 static __always_inline void __apic_send_IPI_mask(const struct cpumask *mask, int vector)
435 static_call_mod(apic_call_send_IPI_mask)(mask, vector);
438 static __always_inline void __apic_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
440 static_call(apic_call_send_IPI_mask_allbutself)(mask, vector);
443 static __always_inline void __apic_send_IPI_allbutself(int vector)
445 static_call(apic_call_send_IPI_allbutself)(vector);
448 static __always_inline void __apic_send_IPI_all(int vector)
450 static_call(apic_call_send_IPI_all)(vector);
453 static __always_inline void __apic_send_IPI_self(int vector)
455 static_call_mod(apic_call_send_IPI_self)(vector);
458 static __always_inline void apic_wait_icr_idle(void)
460 static_call_cond(apic_call_wait_icr_idle)();
463 static __always_inline u32 safe_apic_wait_icr_idle(void)
465 return apic->safe_wait_icr_idle ? apic->safe_wait_icr_idle() : 0;
468 static __always_inline bool apic_id_valid(u32 apic_id)
470 return apic_id <= apic->max_apic_id;
473 #else /* CONFIG_X86_LOCAL_APIC */
475 static inline u32 apic_read(u32 reg) { return 0; }
476 static inline void apic_write(u32 reg, u32 val) { }
477 static inline void apic_eoi(void) { }
478 static inline u64 apic_icr_read(void) { return 0; }
479 static inline void apic_icr_write(u32 low, u32 high) { }
480 static inline void apic_wait_icr_idle(void) { }
481 static inline u32 safe_apic_wait_icr_idle(void) { return 0; }
482 static inline void apic_native_eoi(void) { WARN_ON_ONCE(1); }
483 static inline void apic_setup_apic_calls(void) { }
485 #define apic_update_callback(_callback, _fn) do { } while (0)
487 #endif /* CONFIG_X86_LOCAL_APIC */
489 extern void apic_ack_irq(struct irq_data *data);
491 static inline bool lapic_vector_set_in_irr(unsigned int vector)
493 u32 irr = apic_read(APIC_IRR + (vector / 32 * 0x10));
495 return !!(irr & (1U << (vector % 32)));
498 static inline bool is_vector_pending(unsigned int vector)
500 return lapic_vector_set_in_irr(vector) || pi_pending_this_cpu(vector);
504 * Warm reset vector position:
506 #define TRAMPOLINE_PHYS_LOW 0x467
507 #define TRAMPOLINE_PHYS_HIGH 0x469
509 #ifdef CONFIG_X86_LOCAL_APIC
513 extern struct apic apic_noop;
515 static inline u32 read_apic_id(void)
517 u32 reg = apic_read(APIC_ID);
519 return apic->get_apic_id(reg);
523 typedef int (*wakeup_cpu_handler)(int apicid, unsigned long start_eip);
524 extern int default_acpi_madt_oem_check(char *, char *);
525 extern void x86_64_probe_apic(void);
527 static inline int default_acpi_madt_oem_check(char *a, char *b) { return 0; }
528 static inline void x86_64_probe_apic(void) { }
531 extern u32 apic_default_calc_apicid(unsigned int cpu);
532 extern u32 apic_flat_calc_apicid(unsigned int cpu);
534 extern u32 default_cpu_present_to_apicid(int mps_cpu);
536 void apic_send_nmi_to_offline_cpu(unsigned int cpu);
538 #else /* CONFIG_X86_LOCAL_APIC */
540 static inline u32 read_apic_id(void) { return 0; }
542 #endif /* !CONFIG_X86_LOCAL_APIC */
545 void apic_smt_update(void);
547 static inline void apic_smt_update(void) { }
553 extern void __irq_msi_compose_msg(struct irq_cfg *cfg, struct msi_msg *msg,
556 extern void ioapic_zap_locks(void);
558 #endif /* _ASM_X86_APIC_H */